No !

Look, I'm not a pond wizard, but a UV can only kill what comes past it. Do
you agree ?

It may slow down the "established filter" ideal, but it can never ever kill
bacteria that don't run past it, or have nested in a bio-converter.

The main reason for not turning on your UV too soon is that you are supposed
to have an ammonia/nitrite spike, and that the suspended algae do consume a
part of this. Turning it on too soon may make that spike worse. Clear
water versus healthy water. Suspended algae are your friend in a startup
situation.

UV will never "kill everything". Pre nor post filter.

Let's not make the misunderstandings even bigger.

Theo


"Paul" schreef in bericht
...
UV will kill everything so you need a period of no UV to allow you
bacteria
to grow. I don't see any advantage using a UV after filtering as its main
job is to cause stuff to clumb together to be filtered out by machanical
filtration.

Paul